National Centre of Competence in Research PlanetS
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Workshop: Exoplanets in Binary Stars


Dear all,

you are invited to a 1-day NCCR PlanetS workshop on Exoplanets in Binary Stars this March in Bern!


In short:

What: NCCR PlanetS workshop “Exoplanets in Binary Stars”

When: March 27

Where: University of Bern, Seminar Room 205, Hallerstrasse 6, 3012 Bern



Sebastian Daemgen (ETHZ)
Circumbinary planets & disks
Willy Kley (Tübingen)
Close-in circumbinary & circumstellar planets
David Martin (Geneva)
Rotation of planets around binary stars
Adrien Leleu (Bern)
Discussion I: The big questions of exoplanets in binary stars
Lunch break
Lunch at “Grosse Schanze” (info below)
Observations of wide-orbit planets and disks in binary stars
Sebastian Daemgen (ETHZ)
Exoplanet formation: multiple vs. single stars
Yann Alibert (Bern)
High-contrast imaging of binary systems: first results using the Stellar Double Coronagraph (SDC).
Jonas Kühn (ETHZ)
Direct imaging of a cold brown dwarf with an interior eccentric planet
Anthony Cheetham (Geneva)
SPHERE circumstellar disk imaging and binary stars
Hans Martin Schmid (ETHZ)
Discussion II: strategies & actions
End of meeting



Registration: Fill doodle until March 13,

Talk suggestions: Until March 7 to,, or



Binary stars will become more and more important in the years to come, in particular with the expected discoveries by GAIA and PLATO and ever larger ground-based telescopes coming online. Inevitably, more exoplanet host stars will turn out to be binaries and questions like the following will grow in importance: What dynamical impact does a binary companion have on a planet? Is planet formation hindered or enhanced by the presence of a binary companion? Could binary interaction have brought that planet to the extremely wide or tight orbit we observe it in? How does the presence of a binary affect our observations of the planet?

To discuss the implications of binary stars for exoplanets and to enhance possible collaborations within PlanetS, we plan to cover the following topics, both from an observational and theoretical point of view:

→ Wide planets and protoplanetary disks (as observed with direct imaging and radio interferometry)

→ Close-in planets in P-type and S-type configurations (using RV, transits, and eclipse timing variations)

→ Formation and evolution

We will have review talks and contributed oral presentations. But the main emphasis will be on the discussion: please start to think already today how expertise from the PlanetS crowd may help your current or future binary star+exoplanet project fly. We will dedicate ample time for interaction and to exchange ideas.

If you are interested, please fill the doodle (link above) to register. If you would like to contribute a talk or have a suggestion for a topic to be covered, please don’t hesitate to contact us. We will notify speakers and distribute a final program as soon as possible after March 7. Be aware that we encourage everyone to propose a talk but will give priority to contributions by junior PlanetS members. However, even if we are unable to provide you with a contributed talk there will be lots of time for discussion, including of your research and how it could connect with others.

Lunch/snacks/coffee will be provided for free. Please make your own travel arrangements, PlanetS will reimburse the cost of public transport to and from Bern (please get in touch with your local administration for collective reimbursement).


Looking forward to seeing many of you in March!

-Sebastian, David, Natacha, and Stephane


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University of Bern, Seminar Room 205
Hallerstrasse 6
3012 Bern, Switzerland
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